There is a cross hanging in my room too. It has a sentimental value for my wife, because it was the crucifix her grandmother wore when she was buried, or something like that.
It doesn't bother me. I can say I practically don't see it at all. My wife also have several figurines of other mythological figures like Buddha and Capt. Kirk.
On my side, I have Osiris, Anubis, several nameless Egyptian ushabties, Cthulhu and a Hellraiser puzzle cube and a candle shaped as a gargoyle. So our room is full of religious icons, but we don't look at them as worship objects, but just decoration.
In your case, if that object has a sentimental value, why not keep it? It can't harm you in any way.
But if you feel bothered by it, just take it off the wall and put it in a drawer.
You can have peace. Or you can have freedom. Don't ever count on having both at once. Robert A. Heinlein